1,6-Addition of organolithium compounds to acceptor-substituted enynes catalyzed by a copper(I) arenethiolate
作者:Andreas Haubrich、Mayra van Klaveren、Gerard van Koten、Gabriele Handke、Norbert Krause
DOI:10.1021/jo00073a055
日期:1993.10
Ruthenium-Catalyzed Flash Oxidation of Allenes to α,α'-Dihydroxyketones
作者:Michael Laux、Norbert Krause
DOI:10.1055/s-1997-5759
日期:1997.7
The ruthenium-catalyzed flash oxidation of β-allenic esters 1 furnishes α,α'-dihydroxyketones 2 in 24-72% yield. In the case of the chiral allene 1e, the oxidation proceeds with good diastereoselectivity (88% de), i.e. with efficient axis to center chirality transfer. The flash oxidation can also be used for the synthesis of corticosteroids, as exemplified by the transformation of allenic steroid 4 into dihydroxyketone 5.